Method of shaping metal.



H. NEUMAN. METHOD OF SHAPING METAL.

APPLICATION FILED JAN. 27,1912. 1,091,381 Patented Mar. 24, 1914 2 SHEETS-SHEET 1.

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H. NEUMAN.

METHOD OF SHAPING METAL.

APPLIOATION FILED JAN.27, 1912.

Patented Mar. 24, 1914.

2 SHEETS-SHEET 2.

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HUGO NEUMAN, OF DETROIT, MICHIGAN, ASSIGNOR T DIAMOND MANUFACTURING COMPANY, 013 DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

METHOD OF SHAPING METAL.

particularly to a method for progressively shaping a flat strip or ribbon into channeled form.

15 The invention resides in the novel o my tions as more fully hereinafter describe and ,particularl pointed out in the claims.

In the awin'gs,-Figure"1 represents a side elevation of the machine in which my improved method is carried out; Figs. 2, 3 4 are end elevationsof the several pairs :offorming rolls; Figs. 5 m 9 inclusive are elevations of the several dies; Fig. 10 is a perspective view of the mandrel Fig. 11 is a sectional view illustrating certain details;

Fig. 12 is an elevation of a channeled strip dormed by my improved method; and Figs. .13 to 16 inclusive illustrate different stages of the metal strip during the shaping thereof to the crossrsection shown by Fig. '12.

f I will describe my improved method in connection with the formin of a channel shaped strip A (see Fig. 12 which is designed as a resilient bearing for the edge of 85 a glass panel. This strip has the side edges 0 thereof rebent to provide inwardl extending ortions a spaced from the si es, while Y the atter and the bottom p of the channel are slightly grooved, as indicated by the 40 reference-letters g 1', also, the bottom is tempered, though the sides are not.

. With my' improved method the member A is formed from a flat strip, the sides being progressively shaped and the base of the channeledproduct also progressively temerd. Preferably the progressive temperand shaping are simultaneously effected and the final tempering completed during the channeling operation.

9" lforjcnrr ing out my novel method I de tp'emp 0y the machine illustrated in the s, in whichgnates the bed of the machine.

Specification of Letters Patent. Patented Mar. 24, 1914 Application filed January 27, 1912. Serial No. 673,923.

ing rolls mounted upon shafts journaled in the bed, the shafts being positively and continuously driven at a uniform speed and the shafts of one roller of each set bein yieldabiy pressed toward the other by springs E". is a straightening and beading die arranged intermediate the first two sets of rolls and Q designates a finishing die.

The flat ribbon is fed from the reel (not shown) over a guide roll 0 to the rolls D E. The roll D has formed in the face thereof grooves a b and 0 while the roll E has complementary projections 03? e and f*, the portions a and d being in yieldable contact but the complementary remaining portions being slightly spaced. The circumference of the roll D is greater than its cooperating roll, and as the shafts upon which the rolls are fixed are driven at a uniform speed the forming surfaces of the rolls will be driven at different speeds. Therefore, as thestrip passes between the members D E, the differ- D E, D and D2 E are pairs of form'- ence in speed between the portions 0, (i will tend to slightly lengthen the middle of the strip. This lengthening is substantially taken care of by a slight lateral flowing of the metal between the portions (1 d 7 The portions 12 e and c? f cooperate to bend the sides, the strip as it enters the die P having the form shown in Fig. 13. The die P at its forward end has substantially the same cross'section as that of the strip when it leaves the rolls D E, but the cross-. section of this die gradually tapers to the form shown by Fig. 5, serving to roll the edges of the strip inward, and also correcting any distortion of the strip, giving the latter the contour of Fig. 14. In passing through the rolls D E the ed es are rolled slightly farther, the members E having cooperating grooves g h adjacent the sides of their faces for effecting this operation. At the center, however, the cooperating surfaces are the same as the central portion of roe tion shown by Fig. 15, and in passing through the forming rolls D E the strip is channeled and the tempering completed. Thus, the face of the roll E is grooved or channeled at 7?,the bottom 7' of the groove having the same shape as the projection 01 on the roll E, that is the configuration of the bottom p of the finished product, while the sides of the groove are diverged.

k is a projection on the roll D having a face I of a contour complementary to ;the

portion j of the member E but the sides of this projection are straight and spaced 3. sufficient distance from the diverging, sides of the complementary roll to permit the beaded ends of the strip to pass therethrough. The variation of the circumference between the rolls I) E is greater than between the first two sets of rolls, and the pressure applied to the roll E by the spring E therefore is considerably greater than the pressure applied to the roll E. As the strip passes through these latter rolls, the tempering of the base of the channel is co leted. The strip as it is fed to the die Q as the configuration shown by Fig. 16. This die comprises a plurality of spaced forming members Q, Q Q and Q, through which passes a mandrel Q The forming apertures of these parts gradually increase in size from the member Q to (,2, (see Figs. 6 .to 9 inclusive), and the apertured portion of each member tapers in cross section from the entrance to the exit side thereof, as will be seen upon reference to Fig. 11. The mandrel g is slightly tapered longitudinally from its forward end, while the bottom and sides are slightly concaved to fit the bottom and sides of the channel strip. In passing through the die Q, the form of the member is progressively changed from that shown in Fig. 16 to that of the finished article.

In metal bending machines where the article is of comparatively small cross-section, a slight variation in the thickness of the metal is quite frequently highly objectionable. The fact that the th ckness of the metal strip differs slightly is 01 little importance in the initial steps of shaping the strip,

but as the opening in the finishmgdie is more or less restricted a very slight unevenness in the metal passing therethrough tends to give the latter an uneven or varying crosssection'and also produces a drawing of the sides. To overcome this objection, I have arranged the mandrel within. the members Q Q Q Q, so that it will be free to move, within certain limits, in relation to the forming apertures thereof. As shown, the mandrel is provided with a' vertical projection n which is'arranged within a slot 0? in the member Q and has the forward end thereof posi nod to abut against the member Q the forward movement of the mandrel bein thereby limited. The portion of the mandrel simultaneously tral portion 0 which passes through the forming apertures is of a size sufficiently smaller than the latfrom a flat ribbon of metal, which consists in progressively shaping the sides of ribbon and tempering the central portion during the shaping of the sides.

3. The method of forming channel strips from a flat ribbon of metal, which consists in progressively shaping the sides of the ribbon and shaping and tempering the portion of the ribbon forming the base, simultaneously.

4. The method of forming channel strips from a flat ribbon of metal, which consists in progressively shaping the sides without tempering the same, and progressively tempering and shaping the central portion of the ribbon simultaneously.

5. The method of forming channel strips from a fiat ribbon of metal, which consists in progressively shaping the sides of the ribbon, and progressively tempering the central portion.

6. The method of forming channel strips from a fiat ribbon of metal, which consists in progressively shaping the sides and in passing the ribbon during the' shaping of thesides,'between surfaces having a difierence in speed to temper the portion of the ribbon which forms the base of the channel strip.

7. The method of forming channel strips from a fiat ribbon of metal, which consists in passing the ribbon between a plurality of surfaces having a difierence in speed to progressively shape and temper the ribbon.

8. The method of forming channel strips from a flat ribbon of metal, which consists in passing the ribbon between a plurality of pairs of rolls and dies to progressively shape the sides and progressively temper the base, the final tempering being efiected during the channeling operation.-

9. The method of forming channel strips from a Hat ribbon of metal, which consists in partially shaping the sides of the ribbon,

the ribbon and partially beading the sides, in continuing the tempering of the central portion of the ribbon, and simultaneously shaping the sides, in channeling the ribbon, and in'com leting the tempering of the sides during the channelpartially tempering the cening operation and in then finishing the shaping of the sides.

10. The method of forming channel strips from a fiat ribbon of metal, Which consists in passing th'flat ribbon through a pair of formin rolls tb partially shape the sides of the rib n and partially temper the central portion, in p qssing the ribbon through a straightening and heading die, then 0011-.

tinning tho temperin of the central p' ition snzi the shaping of tie by m'iother oi" rniis, thvn passing the rih Y)! through a pair of rolls to chunnei in nw and com plete the tempering of the central portion of the ribbon, and in finishing the shaping of the sides by dies withoutdrawing the metal.

11. The method of forming channel strips from a flat ribbon of metal, which consists in progrr-ssLvely shaping and heading the sides, in channeling the strip, and in then completing the shaping of the sides.

12. The method of forming channel strips from a fiat ribbon of metal, which consists in passing the flat ribbon through a pair of forming rolls to partially shape the sides of the ribbon, in passing the-ribbon through a straightenii'ig and heading die, in continuing the shaping of the sides of the stri. by another set of rolls, then pziss'"g the ri hhon through a pair of rolls to channei the same, and in finishing the shaping of the sides by passing the strip through stuiirmary dies provided with a shaping mandrel. V

In testimony whereof 1 afiix my signature in presence of two Witnesses.

HUGO NEUMAN.

Witnesses:

\V. J. BELKNAP, JAMES P. BARRY. 

